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"Add the beauty of a waterfall and the ammonia-busting power of biological filtration with a Proline Biofalls. This dual waterfall-filter features three different kinds of filtration, along with plenty of room for beneficial bacteria to colonize. A special swirl chamber ensures that water is dispersed evenly over the media to prevent clogging. An extra-wide spillway provides extra aeration, too. Includes all fittings and filter media."